Application and Setting Notes
Logoff Options for a Device
You can log off a device as follows:
•
Via the on-site operation panel
•
Via communication via the controllable
Device logoff
(
_:319
)
•
Via the binary inputs, general:
>Device funct.logoff on
(
_:507
) or
>Dev. funct.logoff off
(
_:508
)
Conditions for Logging off the Device
[lo functional logoff device, 1, en_US]
Figure 3-102
Logic for Logging off the Device
The conditions for a successful logoff of the device result from the conditions for every activated protection
function.
Logoff of a Device from a Device Combination with Communication via the IEC 61850-8-1 (GOOSE) Protocol
If devices are exchanging data via the IEC 61850-8-1 (GOOSE) protocol, for example, in the case of substation
interlocking, you can set in the receiver device for each received data point the value of this data point when
the transmitter device logs off. This value remains effective in the receiver device until the logoff is canceled
by the transmitter device, even if the transmitter and/or the receiver are switched off in the meantime.
Logoff of a Device from a Device Combination using Protection Communication
If devices in a device combination communicate via the protection interface, you can only log off a device
under the following conditions:
•
Logging off and switching off a device in a device combination must not result in an interruption of the
protection communication.
•
For series-connected topologies, the device must be located at one end of the communication chain as
otherwise, the protection communication is interrupted when the device is logged off and switched off.
For this reason, devices that are not at one of the ends in series-connected topologies cannot be logged
off.
Logoff via Binary Inputs
The following diagrams show potential variants on how to control binary inputs. If you want to use push-
buttons, switch them on as shown in the following figure. Use the push-button Key2 to log off the device; use
the push-button Key1 log on the device again.
3.10.3.2
System Functions
3.10 Device Settings
SIPROTEC 5, High-Voltage Bay Controller, Manual
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Summary of Contents for 6MD85
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